Several empty gondolas sit on the Deering track awaiting pickup from the Soo Line. By the time of this photo in 1990 Finkl Steel was the only customer left on the Deering Line so it really didn't matter if cars were left on the main track. Finkl Steel still uses a self-propelled crane on rails to move cars inside the plant once they are dropped off by CP Rail which absorbed subsidiary Soo Line.
This photo also shows how the brick industrial buildings were at one time built around the curves and contours of the rail lines which served them. This pattern was typical on the Milwaukee Road's North Side operations until widescale deindustrialization and gentrification changed the landscape.